US20050005764A1 - On/off switch for liquid additive injection pump - Google Patents
On/off switch for liquid additive injection pump Download PDFInfo
- Publication number
- US20050005764A1 US20050005764A1 US10/615,273 US61527303A US2005005764A1 US 20050005764 A1 US20050005764 A1 US 20050005764A1 US 61527303 A US61527303 A US 61527303A US 2005005764 A1 US2005005764 A1 US 2005005764A1
- Authority
- US
- United States
- Prior art keywords
- piston
- upstroke
- housing
- actuating shaft
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/008—Control of flow ratio involving a fluid operating a pump motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L21/00—Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
- F01L21/04—Valves arranged in or on piston or piston-rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
Definitions
- the present invention relates generally to a liquid additive injection pump powered by a fluid motor driven by a primary fluid stream to which the liquid additive is to be injected. More specifically, the present invention relates to a mechanism to selectively suspend injection of the liquid additive.
- Fluid powered motors driving an additive injection pump connected to a source of fluid additives are typically installed in a line containing primary fluid under pressure.
- the primary fluid produces reciprocating movement of a piston assembly within a housing of the fluid motor.
- the fluid motor in turn reciprocates a piston within a cylinder of the additive injection pump to draw a quantity of secondary fluid into the primary fluid.
- Such devices have been applied to add medication to drinking water for poultry and livestock, treat water with additives, add fertilizer concentrate to irrigation water, or add lubricant or cleaning agents to water.
- liquid additive injection pumps such as that shown in U.S. Pat. No. 4,558,715, reciprocating movement of the piston assembly is produced by a valve mechanism operable to establish a differential pressure.
- opening and closing of the valve mechanism synchronized to the upstroke and down stroke positions of the piston assembly produces a pressure differential that moves the piston through its reciprocating cycle. Opening and closing of the valve mechanism is synchronized to the piston assembly by an over-center mechanism, which is actuated coincident with the piston assembly reaching the ends of its upstroke and down stroke positions.
- the over-center mechanism is spring-biased and serves to toggle the valve mechanism open and closed when an actuating shaft carried by the piston assembly engages stops that define the ends of its upstroke and down stroke excursions.
- the present invention provides a system to inject a secondary fluid into a primary fluid.
- the system includes a fluid powered motor driven by a primary fluid stream.
- the fluid motor in turn drives a liquid additive injection pump to meter a secondary fluid.
- the fluid powered motor is provided with an on/off switch to suspend injection of the secondary fluid into the primary fluid by suspending operation of the fluid powered motor.
- the fluid powered motor has a reciprocating piston assembly movable in response to a differential pressure established by toggling of a valve mechanism
- the position of an actuating shaft serving as a triggering stop for an over-center mechanism can be selectively offset by an on/off switch mechanism such that the piston assembly reaches the end of its upstroke excursion prior to the valve mechanism being toggled. Without the valve mechanism being toggled, reciprocating movement of the piston assembly is suspended because a differential pressure to move the piston in the down stroke excursion cannot be established.
- the liquid additive injection pump is not driven and injection of the secondary fluid is suspended.
- the on/off switch mechanism may be provided as an extension of the actuating shaft. Further, the on/off switch mechanism may include a cam mechanism to axially displace the actuating shaft into an offset position.
- the cam mechanism may include a handle for ease of manipulation by an operator. The handle may be provided in a manner so as to assume first and second positions corresponding to the “on” and “off” positions of the switch mechanism by being thrown from side-to-side through a 180 degree arc.
- a visual indicator of the condition of the on/off switch mechanism may also be provided. Such a visual indication may be provided by indicia, such as a color, disposed on a portion of the actuating shaft that protrudes through the surface of the housing when the shaft is displaced into the offset position.
- the on/off switch mechanism may comprise a sleeve disposed on the top of the fluid motor housing and an insert axially movable relative to the sleeve.
- a handle actuated cam mechanism is coupled to the insert to move the insert relative to the sleeve such that the insert is displaced to assume a retracted position when the switch mechanism is in the “off” position and a fully inserted position when the switch mechanism is in the “on” position.
- the insert is coupled to the actuator shaft such that when the insert is retracted relative to the sleeve the actuator shaft is moved to the offset position and the reciprocating piston reaches the end of its upstroke excursion without an engagement of a stop on the actuating shaft that triggers the over-center mechanism to toggle the valve mechanism. As a consequence, reciprocating movement of the piston is arrested.
- FIG. 1 is a cut-away illustration of a fluid motor powered liquid additive injection pump provided with an on/off switch to suspend reciprocating movement of the piston assembly of the fluid powered motor;
- FIG. 2 is a vertical cross-section illustration of the fluid powered motor portion of the liquid additive injection pump of FIG. 1 wherein the on/off switch mechanism is in the “on” position and there is normal operation of the reciprocating piston assembly of the fluid powered motor to the end of its upstroke excursion, which results in the valve mechanism being toggled by the over-center mechanism;
- FIG. 3 is a vertical cross-section illustration of the fluid motor portion of the liquid additive injection pump of FIG. 1 wherein the on/off switch mechanism is in the “off” position and normal operation of the reciprocating piston assembly of the fluid motor is suspended;
- FIG. 4 is an illustration of the on/off switch mechanism mounted atop a fluid powered motor driven liquid additive injection pump and showing the visual indicia that the switch mechanism is in the “off” position;
- FIG. 5 is a vertical cross-section illustration of the fluid powered motor portion of the liquid additive injection pump of FIG. 1 wherein the on/off switch mechanism is in the “on” position and there is normal operation of the reciprocating piston assembly of the fluid motor to the end of the down stroke excursion.
- a fluid powered motor 10 is shown.
- a housing 12 including cover 12 A and lower body 12 B, which are connected by clamp 12 C and O-ring 12 D, encloses the fluid powered motor components.
- An inlet conduit 14 provides for acceptance of a primary fluid stream and outlet conduit 16 discharges the primary fluid stream.
- the outlet conduit 16 includes an adapter 16 A and gasket 16 C held with a nut 16 B to an outlet port 17 in lower body 12 B.
- liquid additive injection pump 18 Coupled to fluid powered motor 10 is liquid additive injection pump 18 .
- An inlet conduit having a fitting 20 provides for acceptance of a liquid additive. The liquid additive is drawn into pump 18 from an additive reservoir (not shown) and injected into the primary fluid stream.
- Liquid additive injection pump 18 includes a dosage piston 23 , which is movable within inner cylinder 25 A and outer cylinder 25 B by connecting piston rod 27 .
- the fluid powered motor 10 is coupled to the connecting piston rod 27 to drive the liquid additive injection pump.
- the internal components of the fluid powered motor 10 within housing 12 include a piston assembly 24 .
- a valve mechanism 26 is carried on piston assembly 24 and includes poppet valves 26 A- 26 D.
- An actuator shaft 28 extends through piston assembly 24 and is coupled to an over-center mechanism (not shown) that actuates valve mechanism 26 . Opening and closing of valve mechanism 26 at the upstroke and down stroke positions of the piston creates a differential pressure within housing 12 effective to produce reciprocating movement of piston assembly 24 .
- the internal components of fluid powered motor 10 constitute what is termed a “differential pressure reciprocating piston assembly”.
- a sleeve 34 extends from the top of housing 12 .
- An insert 36 (not shown) is axially movable relative to sleeve 34 by actuation of a cam mechanism 38 using handle 40 .
- the handle rotates through an arc of 180 degrees as it is thrown from side-to-side between the “on” and “off” positions of the switch mechanism 32 .
- the switch mechanism 32 is shown in the “on” position in FIG. 1 . In the “on” position of the switch mechanism, the insert 36 is fully inside sleeve 34 .
- the insert 36 is coupled to actuator shaft 26 to establish the vertical position of the shaft relative to the housing cover 12 A.
- fluid powered motor 10 is shown in a cross-sectional view that includes the over-center mechanism 42 , which is not in view in FIG. 1 .
- the coupling of actuator shaft 28 to insert 36 is also illustrated in FIG. 2 .
- the actuator shaft 28 and the insert 36 are integrally formed as a single unit.
- a cap 44 sits atop insert 36 .
- protrusion of the actuator shaft 28 from the housing cover 12 A provides visual indicia of the condition of the switch mechanism as being “off.”
- the portion of actuator shaft 28 that protrudes from housing cover 12 A may be colored, such as in red, to assist in providing the visual indicia of the condition of the switch mechanism.
- actuator shaft 28 includes a circumferential shoulder 46 , which is aligned to be engaged by collar extension 48 on piston assembly 24 .
- collar extension 48 will engage shoulder 46 .
- valve mechanism 26 is moved to the closed position and the over-center mechanism 42 is triggered to toggle into a position that maintains closure of the valve mechanism.
- a differential pressure is created that causes the piston assembly to begin moving in the down stroke excursion portion of its reciprocating cycle.
- the over-center mechanism forms a bi-stable device that establishes the valve mechanism alternately in open and closed positions.
- FIG. 4 provides an illustration of a fluid motor powered liquid additive injection pump provided with an on/off switch mechanism in accordance with the present invention.
- the switch mechanism is mounted atop the housing of the fluid powered motor.
- the switch mechanism is shown in the “on” and “off” positions. Further shown in FIG. 4 is that when the switch mechanism is in the “off” position the insert 36 at the upper end of the actuator shaft 28 protrudes from the housing.
- a visual indication in the form of a color i.e., red
- the insert does not protrude from the housing and the color indicator is not visible.
- FIG. 5 shows the down stroke position of the piston assembly 24 when the on/off switch mechanism 32 is in the “on” position.
- the valve mechanism 26 has the poppet valves closed in the seated position.
- the over-center mechanism 42 is in the opposite bi-stable condition to that shown in FIG. 2 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
- The present invention relates generally to a liquid additive injection pump powered by a fluid motor driven by a primary fluid stream to which the liquid additive is to be injected. More specifically, the present invention relates to a mechanism to selectively suspend injection of the liquid additive.
- Fluid powered motors driving an additive injection pump connected to a source of fluid additives are typically installed in a line containing primary fluid under pressure. The primary fluid produces reciprocating movement of a piston assembly within a housing of the fluid motor. The fluid motor in turn reciprocates a piston within a cylinder of the additive injection pump to draw a quantity of secondary fluid into the primary fluid. Such devices have been applied to add medication to drinking water for poultry and livestock, treat water with additives, add fertilizer concentrate to irrigation water, or add lubricant or cleaning agents to water. In liquid additive injection pumps, such as that shown in U.S. Pat. No. 4,558,715, reciprocating movement of the piston assembly is produced by a valve mechanism operable to establish a differential pressure. Specifically, opening and closing of the valve mechanism synchronized to the upstroke and down stroke positions of the piston assembly produces a pressure differential that moves the piston through its reciprocating cycle. Opening and closing of the valve mechanism is synchronized to the piston assembly by an over-center mechanism, which is actuated coincident with the piston assembly reaching the ends of its upstroke and down stroke positions. The over-center mechanism is spring-biased and serves to toggle the valve mechanism open and closed when an actuating shaft carried by the piston assembly engages stops that define the ends of its upstroke and down stroke excursions.
- The present invention provides a system to inject a secondary fluid into a primary fluid. The system includes a fluid powered motor driven by a primary fluid stream. The fluid motor in turn drives a liquid additive injection pump to meter a secondary fluid. The fluid powered motor is provided with an on/off switch to suspend injection of the secondary fluid into the primary fluid by suspending operation of the fluid powered motor. In a system wherein the fluid powered motor has a reciprocating piston assembly movable in response to a differential pressure established by toggling of a valve mechanism, the position of an actuating shaft serving as a triggering stop for an over-center mechanism can be selectively offset by an on/off switch mechanism such that the piston assembly reaches the end of its upstroke excursion prior to the valve mechanism being toggled. Without the valve mechanism being toggled, reciprocating movement of the piston assembly is suspended because a differential pressure to move the piston in the down stroke excursion cannot be established. As a consequence, the liquid additive injection pump is not driven and injection of the secondary fluid is suspended.
- The on/off switch mechanism may be provided as an extension of the actuating shaft. Further, the on/off switch mechanism may include a cam mechanism to axially displace the actuating shaft into an offset position. The cam mechanism may include a handle for ease of manipulation by an operator. The handle may be provided in a manner so as to assume first and second positions corresponding to the “on” and “off” positions of the switch mechanism by being thrown from side-to-side through a 180 degree arc. A visual indicator of the condition of the on/off switch mechanism may also be provided. Such a visual indication may be provided by indicia, such as a color, disposed on a portion of the actuating shaft that protrudes through the surface of the housing when the shaft is displaced into the offset position.
- The on/off switch mechanism may comprise a sleeve disposed on the top of the fluid motor housing and an insert axially movable relative to the sleeve. A handle actuated cam mechanism is coupled to the insert to move the insert relative to the sleeve such that the insert is displaced to assume a retracted position when the switch mechanism is in the “off” position and a fully inserted position when the switch mechanism is in the “on” position. The insert is coupled to the actuator shaft such that when the insert is retracted relative to the sleeve the actuator shaft is moved to the offset position and the reciprocating piston reaches the end of its upstroke excursion without an engagement of a stop on the actuating shaft that triggers the over-center mechanism to toggle the valve mechanism. As a consequence, reciprocating movement of the piston is arrested.
-
FIG. 1 is a cut-away illustration of a fluid motor powered liquid additive injection pump provided with an on/off switch to suspend reciprocating movement of the piston assembly of the fluid powered motor; -
FIG. 2 is a vertical cross-section illustration of the fluid powered motor portion of the liquid additive injection pump ofFIG. 1 wherein the on/off switch mechanism is in the “on” position and there is normal operation of the reciprocating piston assembly of the fluid powered motor to the end of its upstroke excursion, which results in the valve mechanism being toggled by the over-center mechanism; -
FIG. 3 is a vertical cross-section illustration of the fluid motor portion of the liquid additive injection pump ofFIG. 1 wherein the on/off switch mechanism is in the “off” position and normal operation of the reciprocating piston assembly of the fluid motor is suspended; -
FIG. 4 is an illustration of the on/off switch mechanism mounted atop a fluid powered motor driven liquid additive injection pump and showing the visual indicia that the switch mechanism is in the “off” position; and -
FIG. 5 is a vertical cross-section illustration of the fluid powered motor portion of the liquid additive injection pump ofFIG. 1 wherein the on/off switch mechanism is in the “on” position and there is normal operation of the reciprocating piston assembly of the fluid motor to the end of the down stroke excursion. - In
FIG. 1 , a fluid poweredmotor 10 is shown. Ahousing 12, includingcover 12A andlower body 12B, which are connected byclamp 12C and O-ring 12D, encloses the fluid powered motor components. Aninlet conduit 14 provides for acceptance of a primary fluid stream andoutlet conduit 16 discharges the primary fluid stream. Theoutlet conduit 16 includes anadapter 16A and gasket 16C held with anut 16B to anoutlet port 17 inlower body 12B. Coupled to fluid poweredmotor 10 is liquidadditive injection pump 18. An inlet conduit having afitting 20 provides for acceptance of a liquid additive. The liquid additive is drawn intopump 18 from an additive reservoir (not shown) and injected into the primary fluid stream. Metering of the liquid additive is adjustable byratio adjustment sleeve 22 and locking pin 22A. Liquidadditive injection pump 18 includes adosage piston 23, which is movable withininner cylinder 25A andouter cylinder 25B by connectingpiston rod 27. The fluid poweredmotor 10 is coupled to the connectingpiston rod 27 to drive the liquid additive injection pump. - The internal components of the fluid powered
motor 10 withinhousing 12 include apiston assembly 24. Avalve mechanism 26 is carried onpiston assembly 24 and includespoppet valves 26A-26D. Anactuator shaft 28 extends throughpiston assembly 24 and is coupled to an over-center mechanism (not shown) that actuatesvalve mechanism 26. Opening and closing ofvalve mechanism 26 at the upstroke and down stroke positions of the piston creates a differential pressure withinhousing 12 effective to produce reciprocating movement ofpiston assembly 24. The internal components of fluid poweredmotor 10 constitute what is termed a “differential pressure reciprocating piston assembly”. - At the top of
housing 12 is on/offswitch mechanism 32. Asleeve 34 extends from the top ofhousing 12. An insert 36 (not shown) is axially movable relative tosleeve 34 by actuation of acam mechanism 38 usinghandle 40. The handle rotates through an arc of 180 degrees as it is thrown from side-to-side between the “on” and “off” positions of theswitch mechanism 32. Theswitch mechanism 32 is shown in the “on” position inFIG. 1 . In the “on” position of the switch mechanism, theinsert 36 is fully insidesleeve 34. Theinsert 36 is coupled toactuator shaft 26 to establish the vertical position of the shaft relative to thehousing cover 12A. - Referring next to
FIG. 2 , fluid poweredmotor 10 is shown in a cross-sectional view that includes the over-centermechanism 42, which is not in view inFIG. 1 . Also illustrated inFIG. 2 is the coupling ofactuator shaft 28 to insert 36. In the illustrated embodiment, theactuator shaft 28 and theinsert 36 are integrally formed as a single unit. Further, as shown, acap 44 sits atopinsert 36. When the switch mechanism is in the “off” position, protrusion of theactuator shaft 28 from thehousing cover 12A provides visual indicia of the condition of the switch mechanism as being “off.” The portion ofactuator shaft 28 that protrudes fromhousing cover 12A may be colored, such as in red, to assist in providing the visual indicia of the condition of the switch mechanism. - As seen in
FIG. 2 ,actuator shaft 28 includes acircumferential shoulder 46, which is aligned to be engaged bycollar extension 48 onpiston assembly 24. As will be appreciated, whenpiston assembly 24 moves in the upstroke excursion,inner collar extension 48 will engageshoulder 46. Uponcollar extension 48 engagingshoulder 46,valve mechanism 26 is moved to the closed position and theover-center mechanism 42 is triggered to toggle into a position that maintains closure of the valve mechanism. Upon closure of the valve mechanism, a differential pressure is created that causes the piston assembly to begin moving in the down stroke excursion portion of its reciprocating cycle. In the position ofactuator shaft 28 shown inFIG. 2 , the range of movement of the piston assembly to the end of its upstroke permits the over-center mechanism to fully toggle. As will also be appreciated, the over-center mechanism forms a bi-stable device that establishes the valve mechanism alternately in open and closed positions. With theactuator shaft 28 in the position shown inFIG. 2 , normal operation providing reciprocating movement of thepiston assembly 24 can continue. - In
FIG. 3 , the handle of the on/offswitch mechanism 32 has been moved to the “off” position. As seen, theinsert 36 and the attachedactuator shaft 28 are displaced to the offset position. As will be appreciated, whenpiston assembly 24 moves in the upstroke excursion,inner collar extension 48 cannot engageshoulder 46 because theouter collar extension 50 will engage the top ofhousing cover 12A ahead of time. As a consequence,valve mechanism 26 will not close to create the differential pressure withinhousing 12 that is necessary to movepiston assembly 24 in the down stroke excursion portion of its reciprocating cycle. Also, althoughover-center mechanism 42 will be partially moved, as seen inFIG. 3 , it will not fully toggle. With theactuator shaft 28 is the position shown inFIG. 3 , normal reciprocating movement operation of thepiston assembly 24 will not continue and liquid additive will no longer be injected into the primary fluid stream. Upon movement ofhandle 40 to the “on” position, however, theinner collar extension 48 will engageshoulder 46 onactuator shaft 28. The valve mechanism will close and the over-center mechanism will complete toggling. The necessary differential pressure required for reciprocating movement ofpiston assembly 24 will be re-established withinhousing 12 and normal operation will resume. -
FIG. 4 provides an illustration of a fluid motor powered liquid additive injection pump provided with an on/off switch mechanism in accordance with the present invention. As shown, the switch mechanism is mounted atop the housing of the fluid powered motor. In the close-up details also shown inFIG. 4 , the switch mechanism is shown in the “on” and “off” positions. Further shown inFIG. 4 is that when the switch mechanism is in the “off” position theinsert 36 at the upper end of theactuator shaft 28 protrudes from the housing. Moreover, a visual indication in the form of a color (i.e., red) is provided on the insert to signify the “off” condition of the switch mechanism to the user/operator. When the switch mechanism is in the “on” position, the insert does not protrude from the housing and the color indicator is not visible. -
FIG. 5 shows the down stroke position of thepiston assembly 24 when the on/offswitch mechanism 32 is in the “on” position. As will be noted, thevalve mechanism 26 has the poppet valves closed in the seated position. Also, theover-center mechanism 42 is in the opposite bi-stable condition to that shown inFIG. 2 . - Although a specific embodiment of the invention has been set forth herein for purposes of explanation and illustration. It is to be understood, however, that various alterations, substitutions, and modifications may be made to the embodiment described herein without departing from the spirit and scope of the invention as set forth in the appended claims.
Claims (15)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/615,273 US6910405B2 (en) | 2003-07-08 | 2003-07-08 | On/off switch for liquid additive injection pump |
PCT/US2004/021256 WO2005008060A2 (en) | 2003-07-08 | 2004-06-30 | On/off switch for liquid additive injection pump |
CA002527951A CA2527951C (en) | 2003-07-08 | 2004-06-30 | On/off switch for liquid additive injection pump |
EP04777416A EP1658442A4 (en) | 2003-07-08 | 2004-06-30 | On/off switch for liquid additive injection pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/615,273 US6910405B2 (en) | 2003-07-08 | 2003-07-08 | On/off switch for liquid additive injection pump |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050005764A1 true US20050005764A1 (en) | 2005-01-13 |
US6910405B2 US6910405B2 (en) | 2005-06-28 |
Family
ID=33564526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/615,273 Expired - Lifetime US6910405B2 (en) | 2003-07-08 | 2003-07-08 | On/off switch for liquid additive injection pump |
Country Status (4)
Country | Link |
---|---|
US (1) | US6910405B2 (en) |
EP (1) | EP1658442A4 (en) |
CA (1) | CA2527951C (en) |
WO (1) | WO2005008060A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108036197A (en) * | 2017-12-19 | 2018-05-15 | 东北石油大学 | A kind of chemicals dosing plant with pressure and its adding method thereof with pressure |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7287504B2 (en) * | 2004-10-29 | 2007-10-30 | Siemens Vdo Automotive Canada Inc. | Over-center actuator |
FR2896279B1 (en) * | 2006-01-13 | 2008-02-29 | Dosatron International | HYDRAULIC MACHINE, ESPECIALLY A HYDRAULIC ENGINE, AND A DOSER COMPRISING SUCH AN ENGINE. |
FR2896281B1 (en) * | 2006-01-13 | 2008-02-29 | Dosatron International | HYDRAULIC MACHINE, IN PARTICULAR A HYDRAULIC ENGINE, WITH ALTERNATIVE MOVEMENT. |
US20100051716A1 (en) * | 2008-09-03 | 2010-03-04 | Walton Frank A | Automated switch for liquid additive injection pump |
IL196598A0 (en) * | 2009-01-19 | 2009-09-22 | Anton Babushkin | Dosing pump |
MX339610B (en) | 2010-01-06 | 2016-05-31 | Puricore Inc | Method of injecting solution into a misting line. |
US8695434B2 (en) | 2012-01-31 | 2014-04-15 | Hammonds Technical Services, Inc. | Fluid additive delivery system powered by the flowing fluid |
US9079142B2 (en) | 2013-03-11 | 2015-07-14 | Oms Investments, Inc. | Hydraulic mixing device for sprayer system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228560A (en) * | 1964-01-22 | 1966-01-11 | Slip Internat Ltd | Apparatus for mixing fluids |
US3610264A (en) * | 1970-06-05 | 1971-10-05 | Honeywell Inc | Manifold valve |
US4809731A (en) * | 1985-01-17 | 1989-03-07 | Frank A. Walton | Liquid injection apparatus having an external adjustor |
US5137435A (en) * | 1991-03-25 | 1992-08-11 | Frank And Robyn Walton 1990 Family Trust | Compression spring fluid motor |
US5513963A (en) * | 1994-08-16 | 1996-05-07 | Frank And Robyn Walton 1990 Family Trust | Direct action fluid motor and injection pump |
US5951265A (en) * | 1997-12-29 | 1999-09-14 | Diemold International, Inc. | Fluid driven reciprocating engine or pump having overcenter, snap-action mechanical valve control |
US6684753B1 (en) * | 1999-02-09 | 2004-02-03 | Dosatron International | Reciprocating differential hydraulic machine, especially a differential hydraulic machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4558715A (en) | 1984-05-16 | 1985-12-17 | Kowatachi International, Ltd. | Apparatus for injecting measured quantities of liquid into a fluid stream |
-
2003
- 2003-07-08 US US10/615,273 patent/US6910405B2/en not_active Expired - Lifetime
-
2004
- 2004-06-30 CA CA002527951A patent/CA2527951C/en not_active Expired - Fee Related
- 2004-06-30 EP EP04777416A patent/EP1658442A4/en not_active Withdrawn
- 2004-06-30 WO PCT/US2004/021256 patent/WO2005008060A2/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228560A (en) * | 1964-01-22 | 1966-01-11 | Slip Internat Ltd | Apparatus for mixing fluids |
US3610264A (en) * | 1970-06-05 | 1971-10-05 | Honeywell Inc | Manifold valve |
US4809731A (en) * | 1985-01-17 | 1989-03-07 | Frank A. Walton | Liquid injection apparatus having an external adjustor |
US5137435A (en) * | 1991-03-25 | 1992-08-11 | Frank And Robyn Walton 1990 Family Trust | Compression spring fluid motor |
US5513963A (en) * | 1994-08-16 | 1996-05-07 | Frank And Robyn Walton 1990 Family Trust | Direct action fluid motor and injection pump |
US5951265A (en) * | 1997-12-29 | 1999-09-14 | Diemold International, Inc. | Fluid driven reciprocating engine or pump having overcenter, snap-action mechanical valve control |
US6684753B1 (en) * | 1999-02-09 | 2004-02-03 | Dosatron International | Reciprocating differential hydraulic machine, especially a differential hydraulic machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108036197A (en) * | 2017-12-19 | 2018-05-15 | 东北石油大学 | A kind of chemicals dosing plant with pressure and its adding method thereof with pressure |
Also Published As
Publication number | Publication date |
---|---|
CA2527951A1 (en) | 2005-01-27 |
EP1658442A2 (en) | 2006-05-24 |
CA2527951C (en) | 2009-12-29 |
EP1658442A4 (en) | 2010-08-25 |
US6910405B2 (en) | 2005-06-28 |
WO2005008060A2 (en) | 2005-01-27 |
WO2005008060A3 (en) | 2005-08-11 |
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